Absolutely fascinating! The Electronic Sackbut.
The 12AU7 dual triode was a workhorse of this time.
I was prompted to look by this story
https://ottawacitizen.com/news/first-synthesizer-quebec-music-festvial
#HamRadio #AmateurRadio #Electronics #Music #CanadianHamRadio #Ottawa
A complete draft of the 1948 Electronic Sackbut circuit schematic
Context The circuit schematic presented below represents the electronic design of Hugh Le Caine’s Electronic Sackbut, built between 1945-1948, as it survives in Ingenium’s collection (artifact no. 1975.0336). Hugh Davies, a prominent electronic music historian, saw the Sackbut as potentially “the first synthesizer” (1984); however, it has remained an elusive character in this field. This […]